1. One who instinctively or habitually doubts, questions, or disagrees with assertions or generally accepted conclusions.2. One inclined to skepticism in religious matters.3. Philosophy a. often Skeptic An adherent of a school of skepticism.b. Skeptic A member of an ancient Greek school of skepticism, especially that of Pyrrho of Elis (360?-272? b.c.).

Eileen85 wrote:1. One who instinctively or habitually doubts, questions, or disagrees with assertions or generally accepted conclusions.2. One inclined to skepticism in religious matters.3. Philosophy a. often Skeptic An adherent of a school of skepticism.b. Skeptic A member of an ancient Greek school of skepticism, especially that of Pyrrho of Elis (360?-272? b.c.).

It seems that definition #1 applies most to teenagers, who have yet to have their curiosity (or sense of humour) ground out of them by formal education, life, or whatever. Randolf Bourne put it this way:

"Youth is the incarnation of reason pitted against the rigidity of tradition; youth puts the remorseless question to everything that is old and established – Why? What is this thing good for? And when it gets the mumbled, evasive answers of the defenders it applies its own fresh, clean spirit of reason to institutions, customs and ideas and finding them stupid, inane or poisonous, turns instinctively to overthrow them and build in their place the things with which its visions teem."--Randolph Bourne (1886-1918)

If one can be taught to believe absurdities, one can commit atrocities. --Voltaire